MARCH 11--A year-long Department of Homeland Security undercover operation targeting prospective “sex tourists” was torpedoed last month after a blogger unwittingly stumbled upon a sleazy web site set up by federal agents and engineered a reverse sting on investigators she mistook for pedophiles, The Smoking Gun has learned.

ederal agents early last year launched a web site for the “Precious Treasure Holiday Company,” which offered to arrange trips to Canada from Cleveland, Ohio for customers seeking sexual encounters with children.